HC rolls are another way to say rolls. The term is best used when trying to hide the fact that you're calling some one obese. The word originated somewhere in New York City, apparently after an extremely obese child with the initials HC transferred to a school there. The term is commonly used among teenagers in the NYC / Upstate NY areas

He has quitea few HC Rolls.
Look at those HC Rolls.
John has some HC Rolls.